1 /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of version 2 of the GNU General Public
5 * License as published by the Free Software Foundation.
10 #include <uapi/linux/bpf.h>
12 #include <linux/workqueue.h>
13 #include <linux/file.h>
14 #include <linux/percpu.h>
15 #include <linux/err.h>
16 #include <linux/rbtree_latch.h>
17 #include <linux/numa.h>
18 #include <linux/wait.h>
20 struct bpf_verifier_env;
28 /* map is generic key/value storage optionally accesible by eBPF programs */
30 /* funcs callable from userspace (via syscall) */
31 int (*map_alloc_check)(union bpf_attr *attr);
32 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
33 void (*map_release)(struct bpf_map *map, struct file *map_file);
34 void (*map_free)(struct bpf_map *map);
35 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
36 void (*map_release_uref)(struct bpf_map *map);
38 /* funcs callable from userspace and from eBPF programs */
39 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
40 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
41 int (*map_delete_elem)(struct bpf_map *map, void *key);
43 /* funcs called by prog_array and perf_event_array map */
44 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
46 void (*map_fd_put_ptr)(void *ptr);
47 u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
48 u32 (*map_fd_sys_lookup_elem)(void *ptr);
49 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
51 int (*map_check_btf)(const struct bpf_map *map, const struct btf *btf,
52 u32 key_type_id, u32 value_type_id);
56 /* The first two cachelines with read-mostly members of which some
57 * are also accessed in fast-path (e.g. ops, max_entries).
59 const struct bpf_map_ops *ops ____cacheline_aligned;
60 struct bpf_map *inner_map_meta;
61 #ifdef CONFIG_SECURITY
64 enum bpf_map_type map_type;
73 u32 btf_value_type_id;
78 /* The 3rd and 4th cacheline with misc members to avoid false sharing
79 * particularly with refcounting.
81 struct user_struct *user ____cacheline_aligned;
84 struct work_struct work;
85 char name[BPF_OBJ_NAME_LEN];
88 struct bpf_offload_dev;
89 struct bpf_offloaded_map;
91 struct bpf_map_dev_ops {
92 int (*map_get_next_key)(struct bpf_offloaded_map *map,
93 void *key, void *next_key);
94 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
95 void *key, void *value);
96 int (*map_update_elem)(struct bpf_offloaded_map *map,
97 void *key, void *value, u64 flags);
98 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
101 struct bpf_offloaded_map {
103 struct net_device *netdev;
104 const struct bpf_map_dev_ops *dev_ops;
106 struct list_head offloads;
109 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
111 return container_of(map, struct bpf_offloaded_map, map);
114 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
116 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
119 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
121 return map->ops->map_seq_show_elem && map->ops->map_check_btf;
124 extern const struct bpf_map_ops bpf_map_offload_ops;
126 /* function argument constraints */
128 ARG_DONTCARE = 0, /* unused argument in helper function */
130 /* the following constraints used to prototype
131 * bpf_map_lookup/update/delete_elem() functions
133 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
134 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
135 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
137 /* the following constraints used to prototype bpf_memcmp() and other
138 * functions that access data on eBPF program stack
140 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
141 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
142 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
143 * helper function must fill all bytes or clear
144 * them in error case.
147 ARG_CONST_SIZE, /* number of bytes accessed from memory */
148 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
150 ARG_PTR_TO_CTX, /* pointer to context */
151 ARG_ANYTHING, /* any (initialized) argument is ok */
154 /* type of values returned from helper functions */
155 enum bpf_return_type {
156 RET_INTEGER, /* function returns integer */
157 RET_VOID, /* function doesn't return anything */
158 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
161 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
162 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
163 * instructions after verifying
165 struct bpf_func_proto {
166 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
169 enum bpf_return_type ret_type;
170 enum bpf_arg_type arg1_type;
171 enum bpf_arg_type arg2_type;
172 enum bpf_arg_type arg3_type;
173 enum bpf_arg_type arg4_type;
174 enum bpf_arg_type arg5_type;
177 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
178 * the first argument to eBPF programs.
179 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
183 enum bpf_access_type {
188 /* types of values stored in eBPF registers */
189 /* Pointer types represent:
192 * pointer + (u16) var
193 * pointer + (u16) var + imm
194 * if (range > 0) then [ptr, ptr + range - off) is safe to access
195 * if (id > 0) means that some 'var' was added
196 * if (off > 0) means that 'imm' was added
199 NOT_INIT = 0, /* nothing was written into register */
200 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
201 PTR_TO_CTX, /* reg points to bpf_context */
202 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
203 PTR_TO_MAP_VALUE, /* reg points to map element value */
204 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
205 PTR_TO_STACK, /* reg == frame_pointer + offset */
206 PTR_TO_PACKET_META, /* skb->data - meta_len */
207 PTR_TO_PACKET, /* reg points to skb->data */
208 PTR_TO_PACKET_END, /* skb->data + headlen */
211 /* The information passed from prog-specific *_is_valid_access
212 * back to the verifier.
214 struct bpf_insn_access_aux {
215 enum bpf_reg_type reg_type;
220 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
222 aux->ctx_field_size = size;
225 struct bpf_prog_ops {
226 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
227 union bpf_attr __user *uattr);
230 struct bpf_verifier_ops {
231 /* return eBPF function prototype for verification */
232 const struct bpf_func_proto *
233 (*get_func_proto)(enum bpf_func_id func_id,
234 const struct bpf_prog *prog);
236 /* return true if 'size' wide access at offset 'off' within bpf_context
237 * with 'type' (read or write) is allowed
239 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
240 const struct bpf_prog *prog,
241 struct bpf_insn_access_aux *info);
242 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
243 const struct bpf_prog *prog);
244 int (*gen_ld_abs)(const struct bpf_insn *orig,
245 struct bpf_insn *insn_buf);
246 u32 (*convert_ctx_access)(enum bpf_access_type type,
247 const struct bpf_insn *src,
248 struct bpf_insn *dst,
249 struct bpf_prog *prog, u32 *target_size);
252 struct bpf_prog_offload_ops {
253 int (*insn_hook)(struct bpf_verifier_env *env,
254 int insn_idx, int prev_insn_idx);
257 struct bpf_prog_offload {
258 struct bpf_prog *prog;
259 struct net_device *netdev;
261 struct list_head offloads;
263 const struct bpf_prog_offload_ops *dev_ops;
268 struct bpf_prog_aux {
275 bool offload_requested;
276 struct bpf_prog **func;
277 void *jit_data; /* JIT specific data. arch dependent */
278 struct latch_tree_node ksym_tnode;
279 struct list_head ksym_lnode;
280 const struct bpf_prog_ops *ops;
281 struct bpf_map **used_maps;
282 struct bpf_prog *prog;
283 struct user_struct *user;
284 u64 load_time; /* ns since boottime */
285 struct bpf_map *cgroup_storage;
286 char name[BPF_OBJ_NAME_LEN];
287 #ifdef CONFIG_SECURITY
290 struct bpf_prog_offload *offload;
292 struct work_struct work;
301 /* 'ownership' of prog_array is claimed by the first program that
302 * is going to use this map or by the first program which FD is stored
303 * in the map to make sure that all callers and callees have the same
304 * prog_type and JITed flag
306 enum bpf_prog_type owner_prog_type;
309 char value[0] __aligned(8);
310 void *ptrs[0] __aligned(8);
311 void __percpu *pptrs[0] __aligned(8);
315 #define MAX_TAIL_CALL_CNT 32
317 struct bpf_event_entry {
318 struct perf_event *event;
319 struct file *perf_file;
320 struct file *map_file;
324 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
325 int bpf_prog_calc_tag(struct bpf_prog *fp);
327 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
329 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
330 unsigned long off, unsigned long len);
332 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
333 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
335 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
336 union bpf_attr __user *uattr);
337 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
338 union bpf_attr __user *uattr);
340 /* an array of programs to be executed under rcu_lock.
343 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
345 * the structure returned by bpf_prog_array_alloc() should be populated
346 * with program pointers and the last pointer must be NULL.
347 * The user has to keep refcnt on the program and make sure the program
348 * is removed from the array before bpf_prog_put().
349 * The 'struct bpf_prog_array *' should only be replaced with xchg()
350 * since other cpus are walking the array of pointers in parallel.
352 struct bpf_prog_array_item {
353 struct bpf_prog *prog;
354 struct bpf_cgroup_storage *cgroup_storage;
357 struct bpf_prog_array {
359 struct bpf_prog_array_item items[0];
362 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
363 void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
364 int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
365 int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
366 __u32 __user *prog_ids, u32 cnt);
368 void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
369 struct bpf_prog *old_prog);
370 int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array,
371 u32 *prog_ids, u32 request_cnt,
373 int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
374 struct bpf_prog *exclude_prog,
375 struct bpf_prog *include_prog,
376 struct bpf_prog_array **new_array);
378 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
380 struct bpf_prog_array_item *_item; \
381 struct bpf_prog *_prog; \
382 struct bpf_prog_array *_array; \
386 _array = rcu_dereference(array); \
387 if (unlikely(check_non_null && !_array))\
389 _item = &_array->items[0]; \
390 while ((_prog = READ_ONCE(_item->prog))) { \
391 bpf_cgroup_storage_set(_item->cgroup_storage); \
392 _ret &= func(_prog, ctx); \
397 preempt_enable_no_resched(); \
401 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
402 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
404 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
405 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
407 #ifdef CONFIG_BPF_SYSCALL
408 DECLARE_PER_CPU(int, bpf_prog_active);
410 extern const struct file_operations bpf_map_fops;
411 extern const struct file_operations bpf_prog_fops;
413 #define BPF_PROG_TYPE(_id, _name) \
414 extern const struct bpf_prog_ops _name ## _prog_ops; \
415 extern const struct bpf_verifier_ops _name ## _verifier_ops;
416 #define BPF_MAP_TYPE(_id, _ops) \
417 extern const struct bpf_map_ops _ops;
418 #include <linux/bpf_types.h>
422 extern const struct bpf_prog_ops bpf_offload_prog_ops;
423 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
424 extern const struct bpf_verifier_ops xdp_analyzer_ops;
426 struct bpf_prog *bpf_prog_get(u32 ufd);
427 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
429 struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
430 void bpf_prog_sub(struct bpf_prog *prog, int i);
431 struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
432 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
433 void bpf_prog_put(struct bpf_prog *prog);
434 int __bpf_prog_charge(struct user_struct *user, u32 pages);
435 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
437 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
438 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
440 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
441 struct bpf_map *__bpf_map_get(struct fd f);
442 struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
443 void bpf_map_put_with_uref(struct bpf_map *map);
444 void bpf_map_put(struct bpf_map *map);
445 int bpf_map_precharge_memlock(u32 pages);
446 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
447 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
448 void *bpf_map_area_alloc(size_t size, int numa_node);
449 void bpf_map_area_free(void *base);
450 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
452 extern int sysctl_unprivileged_bpf_disabled;
454 int bpf_map_new_fd(struct bpf_map *map, int flags);
455 int bpf_prog_new_fd(struct bpf_prog *prog);
457 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
458 int bpf_obj_get_user(const char __user *pathname, int flags);
460 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
461 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
462 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
464 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
467 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
469 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
470 void *key, void *value, u64 map_flags);
471 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
472 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
473 void *key, void *value, u64 map_flags);
474 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
476 int bpf_get_file_flag(int flags);
477 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
480 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
481 * forced to use 'long' read/writes to try to atomically copy long counters.
482 * Best-effort only. No barriers here, since it _will_ race with concurrent
483 * updates from BPF programs. Called from bpf syscall and mostly used with
484 * size 8 or 16 bytes, so ask compiler to inline it.
486 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
488 const long *lsrc = src;
491 size /= sizeof(long);
496 /* verify correctness of eBPF program */
497 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr);
498 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
504 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
505 void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
506 void __dev_map_flush(struct bpf_map *map);
507 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
508 struct net_device *dev_rx);
509 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
510 struct bpf_prog *xdp_prog);
512 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
513 void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
514 void __cpu_map_flush(struct bpf_map *map);
515 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
516 struct net_device *dev_rx);
518 /* Return map's numa specified by userspace */
519 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
521 return (attr->map_flags & BPF_F_NUMA_NODE) ?
522 attr->numa_node : NUMA_NO_NODE;
525 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
527 #else /* !CONFIG_BPF_SYSCALL */
528 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
530 return ERR_PTR(-EOPNOTSUPP);
533 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
534 enum bpf_prog_type type,
537 return ERR_PTR(-EOPNOTSUPP);
540 static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
543 return ERR_PTR(-EOPNOTSUPP);
546 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
550 static inline void bpf_prog_put(struct bpf_prog *prog)
554 static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
556 return ERR_PTR(-EOPNOTSUPP);
559 static inline struct bpf_prog *__must_check
560 bpf_prog_inc_not_zero(struct bpf_prog *prog)
562 return ERR_PTR(-EOPNOTSUPP);
565 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
570 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
574 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
579 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
585 static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
589 static inline void __dev_map_flush(struct bpf_map *map)
594 struct bpf_dtab_netdev;
597 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
598 struct net_device *dev_rx)
605 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
607 struct bpf_prog *xdp_prog)
613 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
618 static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
622 static inline void __cpu_map_flush(struct bpf_map *map)
626 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
627 struct xdp_buff *xdp,
628 struct net_device *dev_rx)
633 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
634 enum bpf_prog_type type)
636 return ERR_PTR(-EOPNOTSUPP);
638 #endif /* CONFIG_BPF_SYSCALL */
640 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
641 enum bpf_prog_type type)
643 return bpf_prog_get_type_dev(ufd, type, false);
646 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
648 int bpf_prog_offload_compile(struct bpf_prog *prog);
649 void bpf_prog_offload_destroy(struct bpf_prog *prog);
650 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
651 struct bpf_prog *prog);
653 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
655 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
656 int bpf_map_offload_update_elem(struct bpf_map *map,
657 void *key, void *value, u64 flags);
658 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
659 int bpf_map_offload_get_next_key(struct bpf_map *map,
660 void *key, void *next_key);
662 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
664 struct bpf_offload_dev *bpf_offload_dev_create(void);
665 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
666 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
667 struct net_device *netdev);
668 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
669 struct net_device *netdev);
670 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
672 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
673 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
675 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
677 return aux->offload_requested;
680 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
682 return unlikely(map->ops == &bpf_map_offload_ops);
685 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
686 void bpf_map_offload_map_free(struct bpf_map *map);
688 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
689 union bpf_attr *attr)
694 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
699 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
704 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
706 return ERR_PTR(-EOPNOTSUPP);
709 static inline void bpf_map_offload_map_free(struct bpf_map *map)
712 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
714 #if defined(CONFIG_STREAM_PARSER) && defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_INET)
715 struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key);
716 struct sock *__sock_hash_lookup_elem(struct bpf_map *map, void *key);
717 int sock_map_prog(struct bpf_map *map, struct bpf_prog *prog, u32 type);
718 int sockmap_get_from_fd(const union bpf_attr *attr, int type,
719 struct bpf_prog *prog);
721 static inline struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key)
726 static inline struct sock *__sock_hash_lookup_elem(struct bpf_map *map,
732 static inline int sock_map_prog(struct bpf_map *map,
733 struct bpf_prog *prog,
739 static inline int sockmap_get_from_fd(const union bpf_attr *attr, int type,
740 struct bpf_prog *prog)
746 #if defined(CONFIG_XDP_SOCKETS)
748 struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
749 int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
750 struct xdp_sock *xs);
751 void __xsk_map_flush(struct bpf_map *map);
754 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
760 static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
766 static inline void __xsk_map_flush(struct bpf_map *map)
771 /* verifier prototypes for helper functions called from eBPF programs */
772 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
773 extern const struct bpf_func_proto bpf_map_update_elem_proto;
774 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
776 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
777 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
778 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
779 extern const struct bpf_func_proto bpf_tail_call_proto;
780 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
781 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
782 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
783 extern const struct bpf_func_proto bpf_get_current_comm_proto;
784 extern const struct bpf_func_proto bpf_get_stackid_proto;
785 extern const struct bpf_func_proto bpf_get_stack_proto;
786 extern const struct bpf_func_proto bpf_sock_map_update_proto;
787 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
788 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
790 /* Shared helpers among cBPF and eBPF. */
791 void bpf_user_rnd_init_once(void);
792 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
794 #endif /* _LINUX_BPF_H */